DER-328: 280mA @ 36V, 90 ~ 132 VAC in

Summary

This document is an engineering report describing a non-isolated LED driver (power supply) utilizing a LNK460KG from the LinkSwitch-PL family of devices. The DER-328 provides a single 10 W dimmable constant current output.

The key design goals were high efficiency and small size. This allowed the driver to fit into A19 sized lamps and be as close to a production design as possible.

The board was optimized to operate with U.S. leading-edge TRIAC dimmers over an AC input voltage range of 90 VAC to 132 VAC, 60 Hz. LinkSwitch-PL IC based designs provide a high power factor (>0.95).

The form factor of the board was chosen to meet the requirements for standard A19 LED replacement lamps. The output is non-isolated and requires the mechanical design of the enclosure to isolate the output of the supply and the LED load from the user.